package com.yuelan.codelib.utils;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Bitmap.Config;
import android.graphics.PorterDuff.Mode;

public class ImageUtils {

	public static Bitmap getCircleBitmap(Bitmap bitmap) {
		return getCircleBitmap(bitmap, bitmap.getWidth(), bitmap.getHeight());
	}

	public static Bitmap getCircleBitmap(Bitmap bitmap, int width, int height) {
		Bitmap croppedBitmap = scaleCenterCrop(bitmap, width, height);
		Bitmap output = Bitmap.createBitmap(width, height, Config.ARGB_8888);
		Canvas canvas = new Canvas(output);
		final int color = 0xff424242;
		final Paint paint = new Paint();
		final Rect rect = new Rect(0, 0, width, height);
		final RectF rectF = new RectF(rect);
		paint.setAntiAlias(true);
		canvas.drawARGB(0, 0, 0, 0);
		paint.setColor(color);
		int radius = 0;
		if (width > height) {
			radius = height / 2;
		} else {
			radius = width / 2;
		}
		canvas.drawCircle(width / 2, height / 2, radius, paint);
		paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
		canvas.drawBitmap(croppedBitmap, rect, rect, paint);
		return output;
	}

	public static Bitmap scaleCenterCrop(Bitmap source, int newHeight,
			int newWidth) {
		int sourceWidth = source.getWidth();
		int sourceHeight = source.getHeight();
		float xScale = (float) newWidth / sourceWidth;
		float yScale = (float) newHeight / sourceHeight;
		float scale = Math.max(xScale, yScale);
		float scaledWidth = scale * sourceWidth;
		float scaledHeight = scale * sourceHeight;
		float left = (newWidth - scaledWidth) / 2;
		float top = (newHeight - scaledHeight) / 2;
		RectF targetRect = new RectF(left, top, left + scaledWidth, top
				+ scaledHeight);
		Bitmap dest = Bitmap.createBitmap(newWidth, newHeight,
				source.getConfig());
		Canvas canvas = new Canvas(dest);
		canvas.drawBitmap(source, null, targetRect, null);
		return dest;
	}
}